Traverse mechanism for rayon pot-spinning machines



Nov. 29, 1949 Filed June '25, 1947 w. HARTLEY 2,489.882

TRAVERSE MECHANISM FOR RAYON POT-SPINNING MACHINES 2 Sheets-Sheet 1 w. HARTLEY 2,489,882

POT-SPINNING MACHINES v 2 Sheets-Sheet 2 lml ll l l h I-F I H Ill. ilk Il TRAVERSE MECHANISM FOR RAYON illii.

Nov. 29, 1949 Filed June 23, 1947 INVENTQR: \JALTE R- HARTLEY Afito/ /nev Patented Nov. 29, 1949 OFFICE TRAVERSE MECHANISM FOR RAYON POT-SPINNING MACHINES Walter Hartley, Radcliffe, England Application June 23, 1947, Serial No. 756,483 In Great Britain August 20, 1946 4 Claims. (Cl. 242158) This invention has reference to the traverse mechanism of rayon pot-spinning machines, and has for its object to provide an improved means for raising and lowering i. e., traversing, the funnels which feed the yarn into the spinning pots, thus providing a creeping traverse, whereby better cakes or spools of yarn can be built up in the spinning pots than is possible at present, the cakes or spools having a more even density and thickness, with greater firmness and stability which ensure safe handling and improve subsequent processing.

Accordingto this invention the traverse rails of a rayon pot-spinning machine are raised and lowered by mechanism comprising rocking traverse arms which rock on a centre progressively moved in an orbit eccentric to a fixed "centre. this movement gradually raising and lowering the terminal points of each stroke of the traverse, the length of the stroke of the traverse rails being adjustable, and also the setting of the lowest point of the stroke.

The invention is more particularly set forth with reference to the accompanying drawings, in which:

Fig. 1 is an end elevation showing part of a spinning frame with the apparatus in position,

Fig. 2 is a side elevation of Fig. 1, and

Fig. 3 is a sectional plan of the eccentric motion on the line 3-3 of Fig. 1.

In the drawings there is shown mechanism which illustrates the invention and is suflicient for a description thereof, but the same mechanism is repeated at intervals throughout the length of the machine. The traverse rails are usually on both sides of the machine, and it is to such a machine that this invention is directed, though it can be adapted to machines having traverse rails on one side.

The traverse rails do not normally extend as one rail for the whole length of the machine, but are arranged end to end in bays or sections so that any one bay or section can be put out of action, and can be stopped without stopping the whole machine.

At each end of each such bay or section there is mechanism according to this invention, though the mechanism at one end has certain features arms set at an obtuse angle are respectively I! and I3, each of which has on it a fiat top face M and I respectively.

Resting on the flat faces l4 and I5 are bowls or rollers l6 adjustable in slots ll in inclined heads I8 of the rods 4 carrying the traverse rails 40, one of which is shown in section in Fig. 1,

so that the traverse rails are all supported on the arms l2 and I3 of the bell-crank lever, and pulls the bowls or rollers 8 and ID into engagement with the heart shaped cam l.

The bell-crank levers are on bushes or sleeves l9 and 20 (see Fig. 3), which fit into one another so that each bell-crank lever can swin independently' of the other, and the inside bush or sleeve 20 is mounted on an eccentric 2| on the geometric center of which the bell-crank levers turn, the eccentric being secured on the shaft 6 and having on it at one end a ratchet wheel 22 on which rests a pawl 23 carried on the side of the arm 9 of one of the bell-crank levers, which pawl has a projecting pin 24 at one side.

The pin 24 projects over a curved arm 25 pivoted at 26, under which is an arm 21 pivoted at 28 and operated by a handle 29, which handle when moved to the rightFig. 1-will turn the arm 21 to the left, and lift the curved arm 25 which in turn will engage the pin 24 on the pawl and lift the pawl out of engagement with the teeth of the ratchet wheel 22.

On one end of the shaft 6 is an arm 30 operated by a handle 3|, which can be moved round a disc 32, which may have slight depressions in it to receive a spring pressed ball 33 which binds on the disc 32 and holds the arm 30 at any position to which it may be turned; by this means the shaft 6 and the eccentrics on it can be turned.

The mechanism so far described is at one end of the shaft 6 of each bay or section and at the other end is similar mechanism, but without the ratchet and pawl mechanism and without the arm 30 for turning the shaft 6. When the machine is in operation the heart shaped cams I which are rotating continuously cause the bellcrank levers to swing up and down to impart the V traverse to the traverse rails, the bowls or rollers 16 moving up and down the faces I4 and I5 of the arms I! and I3, the actual traverse movements being regulated from minimum to maximum by the shape of the cam. The bell-crank levers will, aswill be seen, always rock round their own centre.

The pawl 23, when dropped on to the ratchet wheel 22, will, at each outward movement of the arm 9. turn the ratchet wheel 22, and will overrun the teeth, as it comes back, and as the ratchet wheel is secured-to, or forms part of, the eccentric 2|, it follows that this also will be turned. As the bell-crank levers are mounted on the eccentric, the centre on which they rock. i. e. the geometric center, is slowly moved round in an orbit, and the fulcrum of the bell-crank levers is constantly changing between maximum and minimum positions, and the up and down motion of the ends of the arms I! and I3 have progressively increasing and decreasing amplitudes within the bounds set by other ad ustments and the result is to produce a cheese of yarn laid evenly on the inside of the pot, without the danger of the ends falling in, which at present is a frequent source of trouble.

Before the spinning is begun certain adjustments may be necessary, which may be as follows:

The bowls or rollers l6 may need to be moved up or down in the slots I] to bring it nearer to or further from the centres of the bell-crank levers, and by doing this the length of the up and down movements of the rods 4 and the traverse rails carried by them can be controlled and varied according to the depth of the pot in which the yarn is to be formed into a cheese.

In order to set the lowest point to which the funnels will descend into the pots at the beginning of the spinning, the handle 29 is turned to lift the curved arm 25 and the pawl 23 which thus disconnects the eccentric 2| and the shaft 6 from the bell-crank levers, so that the shaft and the eccentrics at both ends of the shaft can be turned by the handle 3i to the desired position.

It will be appreciated that as the traverse rails with all they carry hang on the rods 4, the lifting movement only is done by the heart shaped cam 1, as the weight on the arms [2 and i3 will pull them down, and in so doing will hold the bowls or rollers 8 and ill in engagement with the cam.

What I claim as my invention and desire to secure by Letters Patent is:

1. Traverse mechanism for rayon pot-spinnine machines comprising a shaft driven by power, a heart shaped cam on said driven shaft, a second shaft vertically below said driven shaft, an eccentric on said lower shaft, forming a hearing and secured to said lower shaft, a pair of bell-crank levers rockably mounted on said eccentric and about its geometric center, one end of each of said bell-crank levers bearing on said heart shaped cam, rods for supporting traverse rails connected to the other ends of said bellcrank levers, and means for progressively rotating the eccentric to move in an orbit, the geometric center of said eccentric thereby gradually raising and lowering the terminal points of each stroke of the traverse.

2. Traverse mechanism for rayon pot-spinning machines comprising a shaft driven by power, a

heart shaped cam on said driven shaft, a second shaft vertically below said driven shaft, an eccentric on said lower shaft, forming a bearing and secured to said lower shaft, a pair of bellcrank levers rockably mounted on said eccentric, one end of each of said bell-crank levers bearing on said heart shaped cam, a traverse rail connected to the other ends of said bell-crank levers, a ratchet wheel on said lower shaft, a pawl on one of said bell-crank levers engaging said ratchet and moving it round, when swinging in one direction and over-running in the opposite direction whereby said shaft and said eccentric are progressively turned, thereby causing the centre about which said bell-crank levers rock to be moved in an orbit and raise and lower the terminal points of each stroke of the traverse.

3. Traverse mechanism for rayon pot-spinning machines comprising a shaft driven by power, a heart shaped cam on said driven shaft, a second shaft vertically below said driven shaft, an eccentric on said lower shaft secured thereto and forming a bearing, a pair of bell-crank levers rockable on said eccentric bearing, a. roller at one end of each bell-crank lever pressing on an edge of said heart shaped cam, a flat face on the top of each other end of said bell-crank levers, a roller resting on each of said flat faces, a slotted head wherein each of said rollers is adjustable, a vertical rod connected to each of said slotted arms, a traverse bar hanging on said vertical rods, a ratchet wheel on said lower shaft, a pawl on the face of said bell-crank levers, engaging said ratchet moving it round and overrunning in the opposite direction to turn the eccentric and progressively move in an orbit the centre about which said bell-crank levers rock, said pawl having on its side a pin, a curved pivoted arm lying at one end under said pin, a handle operated arm under said curved pivoted arm whereby said pawl can be lifted clear of said ratchet wheel.

4. Traverse mechanism for rayon pot-spinning machines comprising a shaft driven by power, a heart shaped cam on said shaft, a second shaft vertically below said driven shaft, an eccentric on said second and lower shaft secured thereto and forming a bearing on said second and lower shaft, a pair of bell-crank levers freely rockable on said eccentric, a ratchet wheel on said second and lower shaft, a pawl on one bell-crank lever to move said ratchet wheel in one direction and to over-ride in the other means for lifting said pawl off said ratchet wheel, an arm on said second and lower shaft at one end, a machine frame, a disc carried by said machine frame over which said arm can be moved to turn said second and lower shaft when said pawl is disengaged from said ratchet to set the lowest point at which spinning is to start, means being provided to hold said handle at its adjusted position on said disc.

WALTER HARTLEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

